1 /* $NetBSD: svc_vc.c,v 1.7 2000/08/03 00:01:53 fvdl Exp $ */ 2 3 /* 4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for 5 * unrestricted use provided that this legend is included on all tape 6 * media and as a part of the software program in whole or part. Users 7 * may copy or modify Sun RPC without charge, but are not authorized 8 * to license or distribute it to anyone else except as part of a product or 9 * program developed by the user. 10 * 11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE 12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR 13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. 14 * 15 * Sun RPC is provided with no support and without any obligation on the 16 * part of Sun Microsystems, Inc. to assist in its use, correction, 17 * modification or enhancement. 18 * 19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE 20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC 21 * OR ANY PART THEREOF. 22 * 23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue 24 * or profits or other special, indirect and consequential damages, even if 25 * Sun has been advised of the possibility of such damages. 26 * 27 * Sun Microsystems, Inc. 28 * 2550 Garcia Avenue 29 * Mountain View, California 94043 30 */ 31 32 #if defined(LIBC_SCCS) && !defined(lint) 33 static char *sccsid2 = "@(#)svc_tcp.c 1.21 87/08/11 Copyr 1984 Sun Micro"; 34 static char *sccsid = "@(#)svc_tcp.c 2.2 88/08/01 4.0 RPCSRC"; 35 #endif 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 /* 40 * svc_vc.c, Server side for Connection Oriented based RPC. 41 * 42 * Actually implements two flavors of transporter - 43 * a tcp rendezvouser (a listner and connection establisher) 44 * and a record/tcp stream. 45 */ 46 47 #include <sys/param.h> 48 #include <sys/lock.h> 49 #include <sys/kernel.h> 50 #include <sys/malloc.h> 51 #include <sys/mbuf.h> 52 #include <sys/mutex.h> 53 #include <sys/proc.h> 54 #include <sys/protosw.h> 55 #include <sys/queue.h> 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 #include <sys/sx.h> 59 #include <sys/systm.h> 60 #include <sys/uio.h> 61 #include <netinet/tcp.h> 62 63 #include <rpc/rpc.h> 64 65 #include <rpc/rpc_com.h> 66 67 #include <security/mac/mac_framework.h> 68 69 static bool_t svc_vc_rendezvous_recv(SVCXPRT *, struct rpc_msg *, 70 struct sockaddr **, struct mbuf **); 71 static enum xprt_stat svc_vc_rendezvous_stat(SVCXPRT *); 72 static void svc_vc_rendezvous_destroy(SVCXPRT *); 73 static bool_t svc_vc_null(void); 74 static void svc_vc_destroy(SVCXPRT *); 75 static enum xprt_stat svc_vc_stat(SVCXPRT *); 76 static bool_t svc_vc_recv(SVCXPRT *, struct rpc_msg *, 77 struct sockaddr **, struct mbuf **); 78 static bool_t svc_vc_reply(SVCXPRT *, struct rpc_msg *, 79 struct sockaddr *, struct mbuf *); 80 static bool_t svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in); 81 static bool_t svc_vc_rendezvous_control (SVCXPRT *xprt, const u_int rq, 82 void *in); 83 static SVCXPRT *svc_vc_create_conn(SVCPOOL *pool, struct socket *so, 84 struct sockaddr *raddr); 85 static int svc_vc_accept(struct socket *head, struct socket **sop); 86 static int svc_vc_soupcall(struct socket *so, void *arg, int waitflag); 87 88 static struct xp_ops svc_vc_rendezvous_ops = { 89 .xp_recv = svc_vc_rendezvous_recv, 90 .xp_stat = svc_vc_rendezvous_stat, 91 .xp_reply = (bool_t (*)(SVCXPRT *, struct rpc_msg *, 92 struct sockaddr *, struct mbuf *))svc_vc_null, 93 .xp_destroy = svc_vc_rendezvous_destroy, 94 .xp_control = svc_vc_rendezvous_control 95 }; 96 97 static struct xp_ops svc_vc_ops = { 98 .xp_recv = svc_vc_recv, 99 .xp_stat = svc_vc_stat, 100 .xp_reply = svc_vc_reply, 101 .xp_destroy = svc_vc_destroy, 102 .xp_control = svc_vc_control 103 }; 104 105 struct cf_conn { /* kept in xprt->xp_p1 for actual connection */ 106 enum xprt_stat strm_stat; 107 struct mbuf *mpending; /* unparsed data read from the socket */ 108 struct mbuf *mreq; /* current record being built from mpending */ 109 uint32_t resid; /* number of bytes needed for fragment */ 110 bool_t eor; /* reading last fragment of current record */ 111 }; 112 113 /* 114 * Usage: 115 * xprt = svc_vc_create(sock, send_buf_size, recv_buf_size); 116 * 117 * Creates, registers, and returns a (rpc) tcp based transporter. 118 * Once *xprt is initialized, it is registered as a transporter 119 * see (svc.h, xprt_register). This routine returns 120 * a NULL if a problem occurred. 121 * 122 * The filedescriptor passed in is expected to refer to a bound, but 123 * not yet connected socket. 124 * 125 * Since streams do buffered io similar to stdio, the caller can specify 126 * how big the send and receive buffers are via the second and third parms; 127 * 0 => use the system default. 128 */ 129 SVCXPRT * 130 svc_vc_create(SVCPOOL *pool, struct socket *so, size_t sendsize, 131 size_t recvsize) 132 { 133 SVCXPRT *xprt; 134 struct sockaddr* sa; 135 int error; 136 137 if (so->so_state & SS_ISCONNECTED) { 138 error = so->so_proto->pr_usrreqs->pru_peeraddr(so, &sa); 139 if (error) 140 return (NULL); 141 xprt = svc_vc_create_conn(pool, so, sa); 142 free(sa, M_SONAME); 143 return (xprt); 144 } 145 146 xprt = svc_xprt_alloc(); 147 sx_init(&xprt->xp_lock, "xprt->xp_lock"); 148 xprt->xp_pool = pool; 149 xprt->xp_socket = so; 150 xprt->xp_p1 = NULL; 151 xprt->xp_p2 = NULL; 152 xprt->xp_ops = &svc_vc_rendezvous_ops; 153 154 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 155 if (error) 156 goto cleanup_svc_vc_create; 157 158 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 159 free(sa, M_SONAME); 160 161 xprt_register(xprt); 162 163 solisten(so, SOMAXCONN, curthread); 164 165 SOCKBUF_LOCK(&so->so_rcv); 166 xprt->xp_upcallset = 1; 167 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 168 SOCKBUF_UNLOCK(&so->so_rcv); 169 170 return (xprt); 171 cleanup_svc_vc_create: 172 if (xprt) 173 svc_xprt_free(xprt); 174 return (NULL); 175 } 176 177 /* 178 * Create a new transport for a socket optained via soaccept(). 179 */ 180 SVCXPRT * 181 svc_vc_create_conn(SVCPOOL *pool, struct socket *so, struct sockaddr *raddr) 182 { 183 SVCXPRT *xprt = NULL; 184 struct cf_conn *cd = NULL; 185 struct sockaddr* sa = NULL; 186 struct sockopt opt; 187 int one = 1; 188 int error; 189 190 bzero(&opt, sizeof(struct sockopt)); 191 opt.sopt_dir = SOPT_SET; 192 opt.sopt_level = SOL_SOCKET; 193 opt.sopt_name = SO_KEEPALIVE; 194 opt.sopt_val = &one; 195 opt.sopt_valsize = sizeof(one); 196 error = sosetopt(so, &opt); 197 if (error) 198 return (NULL); 199 200 if (so->so_proto->pr_protocol == IPPROTO_TCP) { 201 bzero(&opt, sizeof(struct sockopt)); 202 opt.sopt_dir = SOPT_SET; 203 opt.sopt_level = IPPROTO_TCP; 204 opt.sopt_name = TCP_NODELAY; 205 opt.sopt_val = &one; 206 opt.sopt_valsize = sizeof(one); 207 error = sosetopt(so, &opt); 208 if (error) 209 return (NULL); 210 } 211 212 cd = mem_alloc(sizeof(*cd)); 213 cd->strm_stat = XPRT_IDLE; 214 215 xprt = svc_xprt_alloc(); 216 sx_init(&xprt->xp_lock, "xprt->xp_lock"); 217 xprt->xp_pool = pool; 218 xprt->xp_socket = so; 219 xprt->xp_p1 = cd; 220 xprt->xp_p2 = NULL; 221 xprt->xp_ops = &svc_vc_ops; 222 223 /* 224 * See http://www.connectathon.org/talks96/nfstcp.pdf - client 225 * has a 5 minute timer, server has a 6 minute timer. 226 */ 227 xprt->xp_idletimeout = 6 * 60; 228 229 memcpy(&xprt->xp_rtaddr, raddr, raddr->sa_len); 230 231 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa); 232 if (error) 233 goto cleanup_svc_vc_create; 234 235 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len); 236 free(sa, M_SONAME); 237 238 xprt_register(xprt); 239 240 SOCKBUF_LOCK(&so->so_rcv); 241 xprt->xp_upcallset = 1; 242 soupcall_set(so, SO_RCV, svc_vc_soupcall, xprt); 243 SOCKBUF_UNLOCK(&so->so_rcv); 244 245 /* 246 * Throw the transport into the active list in case it already 247 * has some data buffered. 248 */ 249 sx_xlock(&xprt->xp_lock); 250 xprt_active(xprt); 251 sx_xunlock(&xprt->xp_lock); 252 253 return (xprt); 254 cleanup_svc_vc_create: 255 if (xprt) { 256 mem_free(xprt, sizeof(*xprt)); 257 } 258 if (cd) 259 mem_free(cd, sizeof(*cd)); 260 return (NULL); 261 } 262 263 /* 264 * This does all of the accept except the final call to soaccept. The 265 * caller will call soaccept after dropping its locks (soaccept may 266 * call malloc). 267 */ 268 int 269 svc_vc_accept(struct socket *head, struct socket **sop) 270 { 271 int error = 0; 272 struct socket *so; 273 274 if ((head->so_options & SO_ACCEPTCONN) == 0) { 275 error = EINVAL; 276 goto done; 277 } 278 #ifdef MAC 279 error = mac_socket_check_accept(curthread->td_ucred, head); 280 if (error != 0) 281 goto done; 282 #endif 283 ACCEPT_LOCK(); 284 if (TAILQ_EMPTY(&head->so_comp)) { 285 ACCEPT_UNLOCK(); 286 error = EWOULDBLOCK; 287 goto done; 288 } 289 so = TAILQ_FIRST(&head->so_comp); 290 KASSERT(!(so->so_qstate & SQ_INCOMP), ("svc_vc_accept: so SQ_INCOMP")); 291 KASSERT(so->so_qstate & SQ_COMP, ("svc_vc_accept: so not SQ_COMP")); 292 293 /* 294 * Before changing the flags on the socket, we have to bump the 295 * reference count. Otherwise, if the protocol calls sofree(), 296 * the socket will be released due to a zero refcount. 297 * XXX might not need soref() since this is simpler than kern_accept. 298 */ 299 SOCK_LOCK(so); /* soref() and so_state update */ 300 soref(so); /* file descriptor reference */ 301 302 TAILQ_REMOVE(&head->so_comp, so, so_list); 303 head->so_qlen--; 304 so->so_state |= (head->so_state & SS_NBIO); 305 so->so_qstate &= ~SQ_COMP; 306 so->so_head = NULL; 307 308 SOCK_UNLOCK(so); 309 ACCEPT_UNLOCK(); 310 311 *sop = so; 312 313 /* connection has been removed from the listen queue */ 314 KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0); 315 done: 316 return (error); 317 } 318 319 /*ARGSUSED*/ 320 static bool_t 321 svc_vc_rendezvous_recv(SVCXPRT *xprt, struct rpc_msg *msg, 322 struct sockaddr **addrp, struct mbuf **mp) 323 { 324 struct socket *so = NULL; 325 struct sockaddr *sa = NULL; 326 int error; 327 328 /* 329 * The socket upcall calls xprt_active() which will eventually 330 * cause the server to call us here. We attempt to accept a 331 * connection from the socket and turn it into a new 332 * transport. If the accept fails, we have drained all pending 333 * connections so we call xprt_inactive(). 334 */ 335 sx_xlock(&xprt->xp_lock); 336 337 error = svc_vc_accept(xprt->xp_socket, &so); 338 339 if (error == EWOULDBLOCK) { 340 /* 341 * We must re-test for new connections after taking 342 * the lock to protect us in the case where a new 343 * connection arrives after our call to accept fails 344 * with EWOULDBLOCK. The pool lock protects us from 345 * racing the upcall after our TAILQ_EMPTY() call 346 * returns false. 347 */ 348 ACCEPT_LOCK(); 349 mtx_lock(&xprt->xp_pool->sp_lock); 350 if (TAILQ_EMPTY(&xprt->xp_socket->so_comp)) 351 xprt_inactive_locked(xprt); 352 mtx_unlock(&xprt->xp_pool->sp_lock); 353 ACCEPT_UNLOCK(); 354 sx_xunlock(&xprt->xp_lock); 355 return (FALSE); 356 } 357 358 if (error) { 359 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 360 if (xprt->xp_upcallset) { 361 xprt->xp_upcallset = 0; 362 soupcall_clear(xprt->xp_socket, SO_RCV); 363 } 364 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 365 xprt_inactive(xprt); 366 sx_xunlock(&xprt->xp_lock); 367 return (FALSE); 368 } 369 370 sx_xunlock(&xprt->xp_lock); 371 372 sa = 0; 373 error = soaccept(so, &sa); 374 375 if (error) { 376 /* 377 * XXX not sure if I need to call sofree or soclose here. 378 */ 379 if (sa) 380 free(sa, M_SONAME); 381 return (FALSE); 382 } 383 384 /* 385 * svc_vc_create_conn will call xprt_register - we don't need 386 * to do anything with the new connection. 387 */ 388 if (!svc_vc_create_conn(xprt->xp_pool, so, sa)) 389 soclose(so); 390 391 free(sa, M_SONAME); 392 393 return (FALSE); /* there is never an rpc msg to be processed */ 394 } 395 396 /*ARGSUSED*/ 397 static enum xprt_stat 398 svc_vc_rendezvous_stat(SVCXPRT *xprt) 399 { 400 401 return (XPRT_IDLE); 402 } 403 404 static void 405 svc_vc_destroy_common(SVCXPRT *xprt) 406 { 407 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 408 if (xprt->xp_upcallset) { 409 xprt->xp_upcallset = 0; 410 soupcall_clear(xprt->xp_socket, SO_RCV); 411 } 412 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 413 414 sx_destroy(&xprt->xp_lock); 415 if (xprt->xp_socket) 416 (void)soclose(xprt->xp_socket); 417 418 if (xprt->xp_netid) 419 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1); 420 svc_xprt_free(xprt); 421 } 422 423 static void 424 svc_vc_rendezvous_destroy(SVCXPRT *xprt) 425 { 426 427 svc_vc_destroy_common(xprt); 428 } 429 430 static void 431 svc_vc_destroy(SVCXPRT *xprt) 432 { 433 struct cf_conn *cd = (struct cf_conn *)xprt->xp_p1; 434 435 svc_vc_destroy_common(xprt); 436 437 if (cd->mreq) 438 m_freem(cd->mreq); 439 if (cd->mpending) 440 m_freem(cd->mpending); 441 mem_free(cd, sizeof(*cd)); 442 } 443 444 /*ARGSUSED*/ 445 static bool_t 446 svc_vc_control(SVCXPRT *xprt, const u_int rq, void *in) 447 { 448 return (FALSE); 449 } 450 451 static bool_t 452 svc_vc_rendezvous_control(SVCXPRT *xprt, const u_int rq, void *in) 453 { 454 455 return (FALSE); 456 } 457 458 static enum xprt_stat 459 svc_vc_stat(SVCXPRT *xprt) 460 { 461 struct cf_conn *cd; 462 struct mbuf *m; 463 size_t n; 464 465 cd = (struct cf_conn *)(xprt->xp_p1); 466 467 if (cd->strm_stat == XPRT_DIED) 468 return (XPRT_DIED); 469 470 /* 471 * Return XPRT_MOREREQS if we have buffered data and we are 472 * mid-record or if we have enough data for a record 473 * marker. Since this is only a hint, we read mpending and 474 * resid outside the lock. We do need to take the lock if we 475 * have to traverse the mbuf chain. 476 */ 477 if (cd->mpending) { 478 if (cd->resid) 479 return (XPRT_MOREREQS); 480 n = 0; 481 sx_xlock(&xprt->xp_lock); 482 m = cd->mpending; 483 while (m && n < sizeof(uint32_t)) { 484 n += m->m_len; 485 m = m->m_next; 486 } 487 sx_xunlock(&xprt->xp_lock); 488 if (n >= sizeof(uint32_t)) 489 return (XPRT_MOREREQS); 490 } 491 492 if (soreadable(xprt->xp_socket)) 493 return (XPRT_MOREREQS); 494 495 return (XPRT_IDLE); 496 } 497 498 static bool_t 499 svc_vc_recv(SVCXPRT *xprt, struct rpc_msg *msg, 500 struct sockaddr **addrp, struct mbuf **mp) 501 { 502 struct cf_conn *cd = (struct cf_conn *) xprt->xp_p1; 503 struct uio uio; 504 struct mbuf *m; 505 XDR xdrs; 506 int error, rcvflag; 507 508 /* 509 * Serialise access to the socket and our own record parsing 510 * state. 511 */ 512 sx_xlock(&xprt->xp_lock); 513 514 for (;;) { 515 /* 516 * If we have an mbuf chain in cd->mpending, try to parse a 517 * record from it, leaving the result in cd->mreq. If we don't 518 * have a complete record, leave the partial result in 519 * cd->mreq and try to read more from the socket. 520 */ 521 if (cd->mpending) { 522 /* 523 * If cd->resid is non-zero, we have part of the 524 * record already, otherwise we are expecting a record 525 * marker. 526 */ 527 if (!cd->resid) { 528 /* 529 * See if there is enough data buffered to 530 * make up a record marker. Make sure we can 531 * handle the case where the record marker is 532 * split across more than one mbuf. 533 */ 534 size_t n = 0; 535 uint32_t header; 536 537 m = cd->mpending; 538 while (n < sizeof(uint32_t) && m) { 539 n += m->m_len; 540 m = m->m_next; 541 } 542 if (n < sizeof(uint32_t)) 543 goto readmore; 544 if (cd->mpending->m_len < sizeof(uint32_t)) 545 cd->mpending = m_pullup(cd->mpending, 546 sizeof(uint32_t)); 547 memcpy(&header, mtod(cd->mpending, uint32_t *), 548 sizeof(header)); 549 header = ntohl(header); 550 cd->eor = (header & 0x80000000) != 0; 551 cd->resid = header & 0x7fffffff; 552 m_adj(cd->mpending, sizeof(uint32_t)); 553 } 554 555 /* 556 * Start pulling off mbufs from cd->mpending 557 * until we either have a complete record or 558 * we run out of data. We use m_split to pull 559 * data - it will pull as much as possible and 560 * split the last mbuf if necessary. 561 */ 562 while (cd->mpending && cd->resid) { 563 m = cd->mpending; 564 if (cd->mpending->m_next 565 || cd->mpending->m_len > cd->resid) 566 cd->mpending = m_split(cd->mpending, 567 cd->resid, M_WAIT); 568 else 569 cd->mpending = NULL; 570 if (cd->mreq) 571 m_last(cd->mreq)->m_next = m; 572 else 573 cd->mreq = m; 574 while (m) { 575 cd->resid -= m->m_len; 576 m = m->m_next; 577 } 578 } 579 580 /* 581 * If cd->resid is zero now, we have managed to 582 * receive a record fragment from the stream. Check 583 * for the end-of-record mark to see if we need more. 584 */ 585 if (cd->resid == 0) { 586 if (!cd->eor) 587 continue; 588 589 /* 590 * Success - we have a complete record in 591 * cd->mreq. 592 */ 593 xdrmbuf_create(&xdrs, cd->mreq, XDR_DECODE); 594 cd->mreq = NULL; 595 sx_xunlock(&xprt->xp_lock); 596 597 if (! xdr_callmsg(&xdrs, msg)) { 598 XDR_DESTROY(&xdrs); 599 return (FALSE); 600 } 601 602 *addrp = NULL; 603 *mp = xdrmbuf_getall(&xdrs); 604 XDR_DESTROY(&xdrs); 605 606 return (TRUE); 607 } 608 } 609 610 readmore: 611 /* 612 * The socket upcall calls xprt_active() which will eventually 613 * cause the server to call us here. We attempt to 614 * read as much as possible from the socket and put 615 * the result in cd->mpending. If the read fails, 616 * we have drained both cd->mpending and the socket so 617 * we can call xprt_inactive(). 618 */ 619 uio.uio_resid = 1000000000; 620 uio.uio_td = curthread; 621 m = NULL; 622 rcvflag = MSG_DONTWAIT; 623 error = soreceive(xprt->xp_socket, NULL, &uio, &m, NULL, 624 &rcvflag); 625 626 if (error == EWOULDBLOCK) { 627 /* 628 * We must re-test for readability after 629 * taking the lock to protect us in the case 630 * where a new packet arrives on the socket 631 * after our call to soreceive fails with 632 * EWOULDBLOCK. The pool lock protects us from 633 * racing the upcall after our soreadable() 634 * call returns false. 635 */ 636 mtx_lock(&xprt->xp_pool->sp_lock); 637 if (!soreadable(xprt->xp_socket)) 638 xprt_inactive_locked(xprt); 639 mtx_unlock(&xprt->xp_pool->sp_lock); 640 sx_xunlock(&xprt->xp_lock); 641 return (FALSE); 642 } 643 644 if (error) { 645 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv); 646 if (xprt->xp_upcallset) { 647 xprt->xp_upcallset = 0; 648 soupcall_clear(xprt->xp_socket, SO_RCV); 649 } 650 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv); 651 xprt_inactive(xprt); 652 cd->strm_stat = XPRT_DIED; 653 sx_xunlock(&xprt->xp_lock); 654 return (FALSE); 655 } 656 657 if (!m) { 658 /* 659 * EOF - the other end has closed the socket. 660 */ 661 xprt_inactive(xprt); 662 cd->strm_stat = XPRT_DIED; 663 sx_xunlock(&xprt->xp_lock); 664 return (FALSE); 665 } 666 667 if (cd->mpending) 668 m_last(cd->mpending)->m_next = m; 669 else 670 cd->mpending = m; 671 } 672 } 673 674 static bool_t 675 svc_vc_reply(SVCXPRT *xprt, struct rpc_msg *msg, 676 struct sockaddr *addr, struct mbuf *m) 677 { 678 XDR xdrs; 679 struct mbuf *mrep; 680 bool_t stat = TRUE; 681 int error; 682 683 /* 684 * Leave space for record mark. 685 */ 686 MGETHDR(mrep, M_WAIT, MT_DATA); 687 mrep->m_len = 0; 688 mrep->m_data += sizeof(uint32_t); 689 690 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE); 691 692 if (msg->rm_reply.rp_stat == MSG_ACCEPTED && 693 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) { 694 if (!xdr_replymsg(&xdrs, msg)) 695 stat = FALSE; 696 else 697 xdrmbuf_append(&xdrs, m); 698 } else { 699 stat = xdr_replymsg(&xdrs, msg); 700 } 701 702 if (stat) { 703 m_fixhdr(mrep); 704 705 /* 706 * Prepend a record marker containing the reply length. 707 */ 708 M_PREPEND(mrep, sizeof(uint32_t), M_WAIT); 709 *mtod(mrep, uint32_t *) = 710 htonl(0x80000000 | (mrep->m_pkthdr.len 711 - sizeof(uint32_t))); 712 error = sosend(xprt->xp_socket, NULL, NULL, mrep, NULL, 713 0, curthread); 714 if (!error) { 715 stat = TRUE; 716 } 717 } else { 718 m_freem(mrep); 719 } 720 721 XDR_DESTROY(&xdrs); 722 xprt->xp_p2 = NULL; 723 724 return (stat); 725 } 726 727 static bool_t 728 svc_vc_null() 729 { 730 731 return (FALSE); 732 } 733 734 static int 735 svc_vc_soupcall(struct socket *so, void *arg, int waitflag) 736 { 737 SVCXPRT *xprt = (SVCXPRT *) arg; 738 739 xprt_active(xprt); 740 return (SU_OK); 741 } 742 743 #if 0 744 /* 745 * Get the effective UID of the sending process. Used by rpcbind, keyserv 746 * and rpc.yppasswdd on AF_LOCAL. 747 */ 748 int 749 __rpc_get_local_uid(SVCXPRT *transp, uid_t *uid) { 750 int sock, ret; 751 gid_t egid; 752 uid_t euid; 753 struct sockaddr *sa; 754 755 sock = transp->xp_fd; 756 sa = (struct sockaddr *)transp->xp_rtaddr; 757 if (sa->sa_family == AF_LOCAL) { 758 ret = getpeereid(sock, &euid, &egid); 759 if (ret == 0) 760 *uid = euid; 761 return (ret); 762 } else 763 return (-1); 764 } 765 #endif 766